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Solution


Q.

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. The process is             [2020]
1 isothermal    
2 adiabatic    
3 isochoric    
4 isobaric    

Ans.

(2)

Since the entire system is thermally insulated, no heat flows into the system. When the stopcock is removed, the gas expands adiabatically.